Fenders from Speedway motors. They are reproduction 35-37 Ford truck fenders, and they have the flat flange on the back side for mounting to the flat side of the camper. A lot of early auto fenders have the shape we like but don't have a flat mounting surface on the back. Now you have to really want them... They are $200 each plus shipping! Pretty damn pricey, but I think they are worth the look.
The black fenders in this pic are from an early Chevy truck. I found these at a local swap meet for $50 , original 37 Chevy steel, some rust and damage, but a little tlc and bonds was required.

.
Compare to the same camper above , originally with these fenders!

.